Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4033ed42d7341b3…

MALICIOUS

PDF

33.9 KB Created: 2020-03-15 15:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 940b32071c814310952e9a26f787943b SHA-1: 83a3c573a2c7fc2e266e6351232f2f006a993616 SHA-256: f4033ed42d7341b3e7a0f3985b411382dd37efe3023d4cfcacb7579e811769ca
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links pointing to various domains, a technique often used for SEO manipulation or to distribute further malicious content. The document body itself contains garbled text but includes a reference to 'Grafton weather report hourly' and the authoring application 'wkhtmltopdf', suggesting a lure. The primary heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, with the dominant host being 'romelocaltourguides.com'. The embedded URL 'http://fly5c.bpmtc.com/uploads/1/3/1/0/131070751/131070751.html#grafton+weather+report+hourly' is also a key indicator of the attack pattern.

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://fly5c.bpmtc.com/uploads/1/3/1/0/131070751/131070751.html#grafton+weather+report+hourly
    • http://romelocaltourguides.com/uploads/1/3/0/5/130551267/2023245.pdf
    • http://mrstodd.net/uploads/1/3/0/6/130621061/d5419b61.pdf
    • http://www.oranoandcapgemini.com/uploads/1/3/0/7/130738939/lalajowose-vazeligabajav-pubineridar.pdf
    • http://intrepidadventures.net/uploads/1/3/0/6/130605108/9fda63a80b50277.pdf
    • http://knappd.net/uploads/1/3/0/3/130323158/dibudulorodudi.pdf
    • http://www.retiresafeblog.com/uploads/1/3/0/9/130968950/getulatilawasit-moxebutenowi-ziwidumajofego.pdf
    • http://daylilygoatfarm.com/uploads/1/3/0/7/130775685/8892545.pdf
    • http://roadiesrule.com/uploads/1/3/0/2/130270834/7999834.pdf
    • http://piercingsbylexie.com/uploads/1/3/0/6/130639513/5638853.pdf
    • http://janewagman.com/uploads/1/3/0/5/130541133/xipisexolebo.pdf
    • http://rem5forgood.com/uploads/1/3/0/8/130814120/kebod-wujolivabe.pdf
    • http://talinaperkins.com/uploads/1/3/0/4/130475918/28b36d1deac.pdf
    • http://moleculeminions.com/uploads/1/3/0/4/130435851/ralulalogikidi-wipuvepimewis.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bbd.bin
1a54e3cba10624b35afba65f7a1d29cb81ae4776827e08b97c1a432e308ce638		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBD 8224 bytes

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